Sorbacal® SPS: the best solution for acid gas pollution

The choice for innovative flue gas treatment

Main pollutants neutralized

SO2

SO3

HCIHFSelenium

Performance and ease of useSorbacal® SPS is an engineered hydrated lime characterized by high porosity and high surface area to enhance acid gas capture. It has been specifically formulated to remove acidic components from flue gas with greater efficiency, while optimizing the total cost of use. Its implementation requires low or no capital investment.

In the form of a dry, white, ready-to-use powder, Sorbacal® SPS is used predominantly with dry sorbent injection (DSI) as the main gas cleaning technology, or as a way to boost an existing process, such as a semi-dry or a wet scrubber.

Sorbacal® SPS provides superior performance for all acid gases, but is particularly effective for SO2 capture.

Main benefits

• Increased acidic gas mitigation capacity for SO2, SO3, HCl and HF • No additional investment in capital equipment necessary: no switching cost for existing hydrated lime users• Low footprint and limited downtime for installation• Numerous operational benefits: corrosion protection, heat efficiency improvements, reduced air preheater

fouling, reduced minimum operating temperature for selective catalytic reduction systems• SO3 mitigation for blue plume control and activated carbon protection for better mercury capture • Single dosing system for acid gas and mercury control by using Sorbacal® SPS blends with activated carbon• Improved byproduct chemistry and value compared to using sodium sorbents • Reduced metals and chlorides in the purge stream of wet flue-gas desulfurization (FGD) systems

Application areas• Solid fuel users, such as coal, lignite or biomass

power generation units • Industrial production processes (glass, cement,

metals, etc.)• Waste to energy

FSI and/or DSI process

SPS

SPS

FSI: Furnace Sorbent InjectionDSI: Dry Sorbent Injection

Advanced technology available to everyoneThe result of an intensive research program, this innovative, patented product is the most recent development in calcium sorbents on the market. Providing the most effective acid gas removal performance, Sorbacal® SPS allows less sorbent to be injected, thus reducing the overall load on the particulate collection device. The optimized particle size provides excellent flowability and handling characteristics, and aids in collecting particles in either a baghouse filter (BHF) or electrostatic precipitator (ESP). Sorbacal® SPS also boasts lower electrical resistivity, which makes it more compatible with ESPs, unlike any other calcium sorbent on the market.

Wide usage flexibilityAs an effective control strategy for all acid gas pollutants, Sorbacal® SPS can be used in the following applications:

• DSI as the main SO2 control technology, even when moderate-to-high removals are needed • DSI as a boost to an existing flue gas treatment (FGT) system• Circulating dry scrubber (CDS) technology with demonstrated improved performance in specific conditions• Dry injection over a wide range of temperatures: from 120 to 2,000°F (50 to 1,100°C) • Both baghouse filter and ESP particulate control devices, with high effectiveness• Existing DSI systems without added expense• Existing sodium systems without the need for on-site milling

Temperature in °FConditions: SO2,in = 500 (ppm) ; CO2 = 9 (vol%) ; H2O = 10 (vol%)

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Your benefits Sorbacal® SPS provides major benefits in nearly all FGT setups.

More efficient• Lowest usage of any calcium

product on the market today, reducing consumption by 30% or more compared to other FGT-grade hydrated limes

• Better neutralization of SO2, SO3, HCl, and HF

• Proven effectiveness for the capture of gas-phase selenium compounds

• Flexibility: Injection optimization with variable load conditions

• Better collection with an ESP, due to lower resistivity, optimized particle size and reduced mass loading

More practical• Can be used with an existing

sorbent injection system• Ready for use – no milling

required• Multiple production facilities,

very reliable supply• Increases storage capacity,

reducing the number of shipments

• Easier stabilization and higher value of byproducts

More economical• Increased flexibility for future

acid-gas reduction strategies• Option of optimization via

several injection locations • Lowest total cost of use

(sorbent, disposal, equipment operations & maintenance)

Sorbacal® SPS in practiceThe challenge A coal-fired electricity-generating utility needed an SO2 solution to comply with future regulations specifying 60-80% SO2 removal, depending on the coal sulfur content. The facility had no SO2 controls and used an ESP for particulate control. Sodium sorbents were not a good option due to byproduct disposal concerns. Therefore, a low capital cost, calcium-based solution was desirable.

The Lhoist solutionA ten-day test program was conducted to demonstrate that Sorbacal® SPS could meet the future SO2 emission requirements without having a detrimental impact on the ESP. Lhoist recommended injection of Sorbacal® SPS at the air preheater inlet. In the graph, the orange line represents controlled SO2 emissions, while the blue line represents the SO2 emissions upstream of the sorbent injection location. The red line indicates the future SO2 emission limit based on a 30-day rolling average. The grey line shows the injection rates, which were manually controlled to maintain SO2 emission compliance across a rolling average.The SO2 limit was successfully achieved over the test period. Additionally, Sorbacal® SPS had only a minor impact on ESP operation. Opacity only increased by 1-2% throughout the test period, which the client deemed acceptable.

The benefitsDry sorbent injection with Sorbacal® SPS not only provided a calcium-based solution to meet future SO2 emissions requirements, it also had minimal impacts on the balance of the plant, including ESP operation. Additionally, the Sorbacal® SPS byproducts did not cause any disposal concerns in regards to landfilling.

For more information about this case visit the download center at www.sorbacal.us

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Inlet SO2Stack SO2Target SO2Sorbacal® injection rate

24h rolling averages

Injection turned off for 18h

International expertise at your serviceWith global expertise acquired over two decades, our local experts support you both in designing your treatment solution and in using Sorbacal® SPS.

Design

• Modeling and estimating sorbent consumption and byproduct production

• Running computer simulation of product dispersion (computational fluid dynamic modeling)

• Determining the best injection conditions Use

• On-site testing• Performance optimization • Periodic byproduct analysis for performance monitoring• Infrasonic technology to minimize operations & maintenance

associated with conveying-line scaling, plugging and dosing• Reliable logistics services

Infrasound technologyThis technology minimizes the formation of deposits when sorbents are transferred pneumatically. It emits low-frequency sound waves into the pneumatic conveying lines to ensure solid particles stay suspended in the airflow.

Lhoist has implemented the infrasonic equipment successfully at more than 25 client units, as well as its own facilities. This proprietary solution is customized to suit each client’s specific Sorbacal® SPS injection setup.

Patent pending: application number 15/361, 618 in the US, and PCT/EP2016/079012 for international registration

Infrasound equipment

Sorbacal® SPS, a product developed and patented by Lhoist Recherche et Développement S.A.

Lhoist, your global partner in flue gas treatmentLhoist is a multi-national company specialized in hydrated lime, quick lime, dolomitic lime and mineral products. The diversity of our product range, along with the worldwide presence of our industrial sites, enables our group to play a leading partner role across many industrial sectors.

What Lhoist offers

EXPERTISE providing reliable and

effective solutions

SORBENTSmeeting your specific needs

SERVICESoffering customized technical

assistance and logistics support

Photos: Lhoist/Shutterstock/Istock – 09/17Sorbacal® is a trademark of Lhoist Recherche et Développement S.A.

Discover more,www.sorbacal.us

www.lhoist.us